Former Pennsylvania Sen. Rick Santorum with his daughter Isabella on June 6, the day he formally announced his presidential candidacy. (AP photo)

Pennsylvania Republican Rick Santorum, who has campaigned in Iowa more than any other presidential candidate, will kick-off a 10-city Iowa tour next week with a focus on manufacturing.

Santorum, a former U.S. senator, is calling it the “Courage to Fight for American Jobs” tour. The effort comes in the wake of President Barack Obama’s visit to Iowa two days ago to talk about manufacturing.

“Senator Santorum will address his plan to bring manufacturing jobs back to America and discuss revitalizing our industrial and high-tech sectors with businesses across Iowa,” says a statement from the campaign.

Four percent of Iowa likely Republican caucusgoers consider Santorum their first choice for a presidential nominee, which puts him near the bottom of a field of eight declared candidates, a Des Moines Register Iowa Poll shows.